Calculate execution time when sleep() is used

Question

I am trying to read data from the ADC in the Beagle Bone, running Angstrom Linux distribution. I need to use a delay mechanism like sleep(), to only read samples at

Answer 1

The solution to calculate execution time is to get the timestamp at the beginning of your program and at the end. Then make the difference.

#include 
#include 

int main() {

    time_t begin;
    time(&begin);

  // Somethings

   time_t end;
   time(&end);

  printf("Execution time %f\n", difftime(end, begin));
  return (0);
}

EDIT:

#include 
#include 
#include 

int main() {

  struct timeval  tv;
  gettimeofday(&tv, NULL);

double begin =
  (tv.tv_sec) * 1000 + (tv.tv_usec) / 1000 ;


 sleep(2);

 gettimeofday(&tv, NULL);

double end =
  (tv.tv_sec) * 1000 + (tv.tv_usec) / 1000 ;

  printf("Execution time %f\n", end - begin);
  return (0);
}